Korean object markers are simple enough to get into and figure out as a beginner though there are some tricks to them too. The 을 and 를 particles are attached to words to show that it is the object of a sentence.
A simple example of what an object is could be: “I like coffee”, coffee is the object; the thing I am doing something to or in this case liking.
So in Korean, you would say “커피를 좋아해” to denote that coffee is the object. In an example like this where the object is obvious and in casual conversation people can drop the 을/를, but that is the basics of it.